Stator Module Insulation for Planar Drive Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Planar drive systems face challenges in minimizing resistive losses and heat generation due to high current intensities, which can lead to heating of the stator and electromagnetic interference affecting electronic components, and the position-detecting unit is prone to saturation and interference from drive currents.
Innovation Solution
A stator module design with a connection module for drive energy, a power module for generating drive currents, and a sensor module for position detection, where the drive energy line is insulated from the sensor module, allowing for efficient heat dissipation and shielding from electromagnetic interference, and the sensor module is positioned to maintain a minimum distance from the rotor for accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If high current intensity is used to generate sufficient drive force on the rotor, then the drive force is improved, but resistive losses increase leading to intense heating of the stator
Solution Approach 1:
The patent introduces a third dimension (vertical direction) for heat dissipation by providing cooling channels on both the top and bottom sides of the stator. This allows heat to be removed from both surfaces of the stator, effectively doubling the heat dissipation area and enabling the system to handle higher current intensities without excessive temperature rise.
2Force
If high current intensity is used to generate sufficient drive force on the rotor, then the drive force is improved, but electromagnetic alternating fields increase which can disturb electronic components on the stator
Solution Approach 1:
The patent extracts the electronic components from the stator structure by placing them on a separate printed circuit board that is mounted on the rear side of the stator. This spatial separation removes the electronic components from the region affected by electromagnetic alternating fields, thereby reducing electromagnetic interference while allowing high current intensity to be used for generating drive force.
3Measurement precision
If the position-detecting unit is arranged close to the rotor for accurate detection, then position detection accuracy is improved, but the unit becomes prone to saturation and interference from drive currents
Solution Approach 1:
The patent introduces a magnetic shield as an intermediary element positioned between the position-detecting unit and the rotor. This magnetic shield selectively blocks the strong magnetic fields generated by the rotor during drive operation, preventing saturation and interference of the position-detecting unit, while still allowing the unit to accurately detect rotor position through the shield.
4Temperature
If additional cooling components are added to the top side of the stator for heat dissipation, then heat dissipation capability is improved, but device complexity increases
Solution Approach 1:
The patent makes the stator housing multi-functional by integrating cooling channels directly into it. The housing simultaneously serves as the structural enclosure for the stator and as the cooling system, eliminating the need for separate cooling components on the top side. This reduces device complexity while maintaining effective heat dissipation capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design reduces resistive losses, prevents heating, minimizes electromagnetic interference, and allows for precise position detection with improved signal-to-noise ratio, enabling efficient and accurate operation of the planar drive system without additional cooling components on the top side.
Implementation Method 1
a coil conductor (402), to which the drive current can be applied, for generating a magnetic field which drives the rotor
Implementation Method 2
The current-generating unit of the power module and the connection module are connected via a drive energy line for transmitting the provided drive energy
Implementation Method 3
The drive energy line passes through the module housing and is designed in a manner electrically insulated from the sensor module in the module housing
Data Source
AI summary
A stator module for electromagnetically driving a rotor of a planar drive system comprises a connection module to provide drive energy. A power module has a current-generating unit to generate a drive current, which drives the rotor, from the drive energy. A stator unit has a coil conductor, to which the drive current can be applied, for generating a magnetic field which drives the rotor. A sensor module comprises a position-detecting unit to detect a position of the rotor over the sensor unit. The sensor module is arranged in a module housing. The stator unit and power module are arranged on a top side of the module housing and the connection module is arranged on a bottom side. The current-generating unit and the connection module are connected via a drive energy line. The drive energy line passes through the module housing in a manner electrically insulated from the sensor module.